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author | dkf <donal.k.fellows@manchester.ac.uk> | 2008-12-19 14:44:48 (GMT) |
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committer | dkf <donal.k.fellows@manchester.ac.uk> | 2008-12-19 14:44:48 (GMT) |
commit | 2cd073ec4bf5ea28c2f1d7db65f4ce95cc875611 (patch) | |
tree | 52b7482cbfbaacbd79b4390955254de21b6e7e65 /compat/zlib/contrib/asm686/README.686 | |
parent | bfa6d081abacd1d00e3a459c3d89039849818d6a (diff) | |
download | tcl-2cd073ec4bf5ea28c2f1d7db65f4ce95cc875611.zip tcl-2cd073ec4bf5ea28c2f1d7db65f4ce95cc875611.tar.gz tcl-2cd073ec4bf5ea28c2f1d7db65f4ce95cc875611.tar.bz2 |
Add previously omitted files so we have a complete zlib 1.2.3 distro...
Diffstat (limited to 'compat/zlib/contrib/asm686/README.686')
-rw-r--r-- | compat/zlib/contrib/asm686/README.686 | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/compat/zlib/contrib/asm686/README.686 b/compat/zlib/contrib/asm686/README.686 new file mode 100644 index 0000000..a593f23 --- /dev/null +++ b/compat/zlib/contrib/asm686/README.686 @@ -0,0 +1,34 @@ +This is a patched version of zlib, modified to use +Pentium-Pro-optimized assembly code in the deflation algorithm. The +files changed/added by this patch are: + +README.686 +match.S + +The speedup that this patch provides varies, depending on whether the +compiler used to build the original version of zlib falls afoul of the +PPro's speed traps. My own tests show a speedup of around 10-20% at +the default compression level, and 20-30% using -9, against a version +compiled using gcc 2.7.2.3. Your mileage may vary. + +Note that this code has been tailored for the PPro/PII in particular, +and will not perform particuarly well on a Pentium. + +If you are using an assembler other than GNU as, you will have to +translate match.S to use your assembler's syntax. (Have fun.) + +Brian Raiter +breadbox@muppetlabs.com +April, 1998 + + +Added for zlib 1.1.3: + +The patches come from +http://www.muppetlabs.com/~breadbox/software/assembly.html + +To compile zlib with this asm file, copy match.S to the zlib directory +then do: + +CFLAGS="-O3 -DASMV" ./configure +make OBJA=match.o |